US3689253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reclaiming lead from storage batteries
Assignee: Minerals Technology Corp
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Filing: 1970-08-27
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Granted: 1972-09-05
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Expires: 1990-08-27
Abstract
Abstract LEAD IS RECOVERED FROM STORAGE BATTERIES BY A PROCESS THAT INVOLVES BREAKING THE BATTERIES INTO SMALL PIECES, SEPARATING THE BROKEN BATTERIES INTO: (A) INSULATOR CHIPS; (B) LEAD BUCKLES OR FRAGMENTS; AND (C) SLUDGE CONTAINING LEAD SULPHATE. THE SLUDGE, NOW SUBSTANTIALLY FREE OF INSULATOR CHIPS AND LEAD BUCKLES, IS MIXED WITH AQUEOUS SODIUM CARBONATE OR THE LIKE WITH AGITATION TO PRODUCE A REACTION PRODUCT THAT CAN BE EASILY SMELTED WITH CARBONACEOUS REDUCING AGENTS AND SIMPLE FLUXES AT TEMPERATURES FROM 900*-1050*C.
Inventors
- 👤 Adrian C Dorenfeld
- 👤 Gust Bitsianes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:59
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/54; C; C22; C22B; C22B13/00; C22B5/00; C22B5/02; C22B5/10; C22B7/00; C22B7/005; C22B7/006; C22B7/008; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y02W; Y02W30/00; Y02W30/50; Y02W30/84
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |